This is documentation for the next SDK version. For up-to-date documentation, see the latest version (SDK 54).

Expo MediaLibrary (next)

A library that provides access to the device's media library.

Android

iOS

tvOS

Included in Expo Go

expo-media-library provides access to the user's media library, allowing apps to read existing images and videos, as well as save new ones.

On Android, full access to the media library (the main purpose of this package) is allowed only for apps that require broad access to photos. See details on Google Play's Photo and Video Permissions policy.

Installation

Terminal

- npx expo install expo-media-library

If you are installing this in an existing React Native app, make sure to install expo in your project.

Usage

Add a new asset from the web

import { View, Text } from 'react-native';
import { Image } from 'expo-image';
import { useEffect, useState } from 'react';
import { File, Paths } from 'expo-file-system';
import { Asset, requestPermissionsAsync } from 'expo-media-library/next';

export default function SaveToMediaLibraryExample() {
  const [asset, setAsset] = useState<Asset | null>(null);

  const downloadFile = async () => {
    const url = 'https://picsum.photos/200/300';
    const destinationFile = new File(Paths.cache, 'test_image.jpg');
    if (destinationFile.exists) {
      return destinationFile;
    } else {
      return File.downloadFileAsync(url, destinationFile);
    }
  };

  useEffect(() => {
    const downloadAndSaveAsset = async () => {
      const file = await downloadFile();
      const { status } = await requestPermissionsAsync();
      if (status !== 'granted') {
        return;
      }
      const asset = await Asset.create(file.uri);
      setAsset(asset);
    };

    downloadAndSaveAsset();
  }, []);

  return (
    <View>
      {asset ? (
        <>
          <Text>{asset.id}</Text>
          <Image source={{ uri: asset.id }} style={{ width: 200, height: 300 }} />
        </>
      ) : (
        <Text>Downloading and creating asset...</Text>
      )}
    </View>
  );
}

Retrieve asset properties

import { View, Text } from 'react-native';
import { useEffect, useState } from 'react';
import { AssetField, MediaType, Query, requestPermissionsAsync } from 'expo-media-library/next';

export default function RetrievingAssetPropertiesExample() {
  const [assetInfo, setAssetInfo] = useState<{
    id: string;
    filename: string;
    mediaType: string;
    width: number;
    height: number;
    creationTime: number | null;
    modificationTime: number | null;
  } | null>(null);

  useEffect(() => {
    const querySomeAsset = async () => {
      const { status } = await requestPermissionsAsync();
      if (status !== 'granted') {
        return;
      }

      const [asset] = await new Query().limit(1).eq(AssetField.MEDIA_TYPE, MediaType.IMAGE).exe();

      if (asset) {
        const filename = await asset.getFilename();
        const mediaType = (await asset.getMediaType()).toString();
        const width = await asset.getWidth();
        const height = await asset.getHeight();
        const creationTime = await asset.getCreationTime();
        const modificationTime = await asset.getModificationTime();
        setAssetInfo({
          id: asset.id,
          filename,
          mediaType,
          width,
          height,
          creationTime,
          modificationTime,
        });
      } else {
        console.log('No assets found in the media library.');
      }
    };

    querySomeAsset();
  }, []);

  return (
    <View>
      {assetInfo ? (
        <View>
          <Text>Asset ID: {assetInfo.id}</Text>
          <Text>Filename: {assetInfo.filename}</Text>
          <Text>Media Type: {assetInfo.mediaType}</Text>
          <Text>
            Dimensions: {assetInfo.width} x {assetInfo.height}
          </Text>
          <Text>
            Creation Time:{' '}
            {assetInfo.creationTime
              ? new Date(assetInfo.creationTime).toLocaleString()
              : 'Unavailable'}
          </Text>
          <Text>
            Modification Time:{' '}
            {assetInfo.modificationTime
              ? new Date(assetInfo.modificationTime).toLocaleString()
              : 'Unavailable'}
          </Text>
        </View>
      ) : (
        <Text>Fetching asset ...</Text>
      )}
    </View>
  );
}

Create a new album

import { View, Text, FlatList, Image, Button } from 'react-native';
import { useState } from 'react';
import {
  Asset,
  AssetField,
  MediaType,
  Query,
  requestPermissionsAsync,
  Album,
} from 'expo-media-library/next';

export default function CreateAlbumExample() {
  const [assets, setAssets] = useState<Asset[]>([]);
  const [album, setAlbum] = useState<Album | null>(null);
  const [albumTitle, setAlbumTitle] = useState<string>('');

  const createAlbumWithAsset = async () => {
    await requestPermissionsAsync();

    const [asset] = await new Query().limit(1).eq(AssetField.MEDIA_TYPE, MediaType.IMAGE).exe();

    if (!asset) {
      console.log('No assets found in the media library.');
      return;
    }

    const newAlbum = await Album.create('MyNewAlbum', [asset]);

    setAlbum(newAlbum);
    setAlbumTitle(await newAlbum.getTitle());
    const albumAssets = await newAlbum.getAssets();
    setAssets(albumAssets);
  };

  return (
    <View style={{ flex: 1, padding: 20 }}>
      <Button title="Create Album and Add Asset" onPress={createAlbumWithAsset} />

      {assets.length > 0 ? (
        <>
          <Text style={{ marginTop: 20, fontSize: 18, fontWeight: 'bold' }}>
            Assets in {albumTitle}:
          </Text>
          <FlatList
            data={assets}
            keyExtractor={item => item.id}
            renderItem={({ item }) => (
              <View style={{ marginVertical: 10 }}>
                <Image
                  source={{ uri: item.id }}
                  style={{ width: 100, height: 100, borderRadius: 8 }}
                />
              </View>
            )}
          />
        </>
      ) : (
        <Text style={{ marginTop: 20 }}>{album ? 'Album is empty.' : 'No album created yet.'}</Text>
      )}
    </View>
  );
}

API

No API data file found, sorry!